Edited : 28/6/2018 (added my own custom made “S” crown for SKX007 diver mod)
Edited : 12/12/2017 (add Mr Jake of Dagaz video on dismantle the SKX. Credit goes to Dagaz.)
After doing the “Triple charge your Seiko SKX007 with Dragon Shroud, Jumbo crown and a NH36 !” article.
( https://seikoparts.wordpress.com/2015/07/27/review-triple-charge-your-seiko-skx007-with-dragon-shroud-jumbo-crown-and-a-nh36/ ) .
I have been receiving many request to do a tutorial for updating the SKX007 <or SKX009> to the later NE15 (6R15) or NH35 (4R35) movement while highlighting the necessary parts swap to make it work !
Since i do not have any similar project currently. I will be writing this tutorial basing on mine existing pictorial and Nicholas Hacko’s excellent 7S26 servicing pictorial. (Credit goes to Nicholas Hacko).
For this “Supercharge your SKX007 with a NH35/36” tutorial, i am assuming that you have the tools and know how to remove the :
a) back case
b) stem
c) hands
c) dial
d) remove movement from the watch case
——————————————————————-
Lets begin with the parts swap.
You will need a new NH35 stem (the 7S26 stem will not work with NH35 movement).
( https://seikoparts.wordpress.com/2015/07/15/for-sale-various-new-watch-stem-nos/ )
**below pix shows the stem differences.
NEW aftermarket crown
Original Seiko SKX007 crown and stem are not detachable. So a aftermarket replacement from the ebay will needs to be sourced.
*see the difference below pix.
OR Seiko’s SARB059 cr0wn
If you are a purist and really “MUST and INSIST” to use an original Seiko crown. Or using an aftermarket crown wouldn’t let you sleep in peace.
You can try to find the SARB059 crown [Seiko Part Number 1E70D1SNS0]. This crown is a direct swap on the SKX007 Case. For Bonus ! It has a “S” marking at the crown too !
Many have asked me to supply them with an aftermarket crown and a suitable pre-cut length NH35/NH36 stem as a package.
OK guys, after many consideration and investment. I have decided to go ahead and custom made my own “S” crown for the SKX007 Supercharge upgrade.
They are custom made as close to the SARB059 crown as possible but with some improvement.
Lets have a look at the new “S” crown improvement :
The “S” crown
The pre-cut stem will fit nicely onto the “S” crown to provide a plug and play application !
They are made with “Double gasket” for added water resist application !
Additional crown “Bottom gasket” for even more water resist assurance !
So there you have it guy ! The “S” crown option.
Its offer “S” crown alone or with a NH35/36 stem.
You can read more about the “S” crown here : https://seikoparts.wordpress.com/2018/06/28/introducing-the-s-crown-a-sarb059-alternative/
————————————————————————————————————————————————————
OK, once you have the above sorted out. Next will be the plastic movement spacer.
NH35 movement comes with the gray plastic movement spacer. See pix below.
Seiko makes 2 type of plastic movement spacer the 2mm (Gray) and the 3mm (Black) spacer thickness.
Although it has been reported that the NH35 Gray spacer work well in the SKX007 watch case and swapping the thicker black spacer is not necessary. A little investigation reveal that the casing diameter is slightly bigger for the NH35 (which may explained the tighter fit and get away with it).
Anyway, we will do a proper job by also swapping the Seiko black plastic movement spacer into the NH35.
Most of the NH35 available in the market currently are 3pm DATE position. It fit well into the SKX dial but needs to transfer DAY wheels from the 7S26 to the NH35. (For NH36 with DAY/DATE, they are also at 3pm position. The DAY location will be misaligned when installed on the SKX dial (see below pix). Similar works will needs to be performed too. So no difference buying the NH35 or NH36 movement !).
Below Nicholas Hacko’s excellent DAY/DATE removal guide below [so i don’t have re-do this part] :
Remove the snap clip
Remove the day wheel
Remove the intermediate day correction wheel
Remove the 4 screws
Remove the plate
Remove the DAY/DATE setting wheel
IF you are just swapping the DAY wheel. Do the same for the other movement and install with reverse procedure.
That will complete your necessary swap required for “Supercharging your SKX007 with a NH35” !
Note : i am not taking calendar wheel colours into account at this stage.
IF calendar wheel colour is a concern, please proceed with additional steps below on swapping out the DATE wheels too !
——————————————————————-
Remove jumper plate
Remove date wheel
Do the same for the other movement and install with reverse procedure.
——————————————————————-
Some reader has asked me about adding a tutorial on dismantling the Seiko SKX.
Mr Jake of Dagaz has previously done an excellent video which is about 6.5 minutes on the works. Do enjoy his video below.
(Credit goes to Mr Jake of Dagaz)
——————————————————————-
OK, there you have it. Hope you guys enjoy the “Supercharge your SKX007 with a NH35” !
seikoparts 
I am new to this whole swap movement thing but am willing to try it because my skx173 is annoying fast then slow, theme stops and not very accurate. Hopefully you can help me with a few things. I have a brand new Nh35 and a brand new seiko sarb 059 crown with stem attached. So, what I understand is all I have to do is: use black spacer with nh35 movement.
Use the Sarb 059 crown, minus the stem and put it back together, no problem! Right???
Hopefully I can get the stem off by taking the gasket off and putting it in hot water for a while before taking it apart! Does all this sound correct???
Hi,
Your understanding is correct !
Thanks for sharing your knowledge! It was very helpful. We hope you donāt mind us sharing this with our followers.
Great post. Detail and still shots are excellent! Makes one feel that the mod doesn’t require an engineering degree. Love my skx as should anyone who owns one. A great watch and a fun watch for the beginning collector/watch enthusiast. Question: in terms of function (and specs) how does the NH movement compare to the 7S??
Depending on yr needs.
NH36 basically is a updated 7s26 with winding and hacking functions.
*also updated Spron spring too !
Reblogged this on Strapcode and commented:
How to take your Seiko SKX007 movement out of the case
[…] Source: Supercharge your SKX007 with a NH35 […]
Sure strapcode ! Go ahead and share it !
Glad you enjoy it.
Nice instruction!
I bought a 7S36 (NH36A) movement for my SKX007. I have all parts for modding, except the crown. I have a 7S26 crown and stem, which are not detachable. What to buy? Will this SARB059 crown work with my movement? Thank You for reply!
Yes, the SARB059 crown will work. You will also need NH36 stem.
*meantime 7S36 is not a NH36. 7S36 is similar to 7S26 not hacking or manual winding function
A week ago I bought here and (received- thanks for them) stem for my NH36A. In this case I’ll order on ebay that beutiful SARB059 crown. It would be a real crown on my modded SKX007.
Thank You for the answer!
But..Will not my movement be a hand-winding and hacking stucture? I wanted to upgrade from 7S26..
You will need to swap either aNH35,NH36, 4r35,4r36, 6r15.
All uses the same stem
My (probably) last question: where can I buy one of these movements? On ebay I just found NH36A – which You say- not hand winding, hacking structure.
I found this, but I think this one is also a NH36A, not an NH36.
Thank You all Your help!
Just send u a email
[…] https://seikoparts.wordpress.com/2015/07/27/review-triple-charge-your-seiko-skx007-with-dragon-shrou… […]
Where can I buy Seiko 4R36 movement, Seiko SRPB11K1 Dial (part number 4R3604Z4XL23) and full set hands?
You can buy a NH35/NH36 (similar to 4R36) here :
For the Turtle Reissue Seiko SRPB11K1 dial and hands, suggest you scout them at various sales forum. Some time you might get lucky.
Any watch repairer available to do this job? I have all the parts.
Hi Bernard, It will helps if you state your place.
Puerto Rico, USA. Can ship to any place.
Thanks
I am sure there will be Seiko Fans in Puerto Rico which can help. Have you try in USA ? There is a few modder there whom can take the job.
That’s what I’m looking for. I tried here with no results. Kindly request someone I can sent the mod no matter where it is.
I am not sure about Puerto Rico, but here is a list of modder nearest to you in USA.
USA Epping, New Hampshire Wayne Blaney wayneblaney@yahoo.com
USA Florida, USA Ryan Bond rightontimewatches.com
USA Los Angeles, CA Ray Dollete rjdollete@gmail.com
USA MASSILLON OHIO Mike Neidert Michael.neidert@gmail.com
USA Michigan Jeff Elgas Elgasjef@gmail.com
USA Nashville TN Alan Markle alanmarkle@yahoo.com
USA New Jersey Dave Sutton Facebook or fly_n_fool@yahoo.com
USA Overland Park, Kansas KC Watch 913-381-2675
USA Philadelphia Aaron Grando aaron.grando@gmail.com
USA VA Crystal “CG” cgawcchannel@gmail.com
Great article and thanks for your skill and advice. My question: I am planning to modify a Seiko 5 for my father by changing the current dial for an instrument type with big hands that are easier for him to see. My Dad doesn’t want the day/date so I will source a plain face, no problem. Should I just change the dial and cover up the day/date or could I remove the day and date dials and wheels and leave them out of the watch entirely?
Hi Neil, there is no need to remove the day or date wheel. The movement and dial (non day/date) will work just nice.
Enjoy the mod. Write back (or email) should you need more assistance.
That’s clear, many thanks indeed.
I plan to supercharge my SKX007 with 6R15. I already have SARB059 crown on the way, but have serious worries about “date-only dial” part.
Did I need to get dial like Sumo (6R15 basedwatches with 4:00 crown) or anyone will fit? Local dealer of Seiko parts can find for me original Seiko SRPB53 Samurai dial, chapter ring and full set hands. This is 4R35 based watch with 3:00 crown, did this dial and chapter ring i`ll fit 007 case?
I was not able to like custom dial, probably will use original Seiko dial of another model, the question is which one will fit?
Firstly, the SARB Crown is a good start.
Secondly the 6R15 will work, but its a date only as you are aware.
Just the Sumo dial and the 6R15 will work on the SKX ! You dont need any other parts.
Alternatively, you can also choose to swap parts (day wheel, day corrector set gears) from the SKX’s 7S26 to the 6R15 and make it a day/date !
In this way you can use back the SKX dial.
This mean SRPB53 Samurai dial will not fit because his 3:00h crown?
For the Samurai dial (3pm crown) to fit into the SKX case (4pm crown… 3.45pm crown actually).
The dial feet will needs to be removed and secure with dial dot. So technically its still possible with some mod. (This is not accepted by purist).
For simplicity, using any Seiko’s dial which is at 4pm (and using either 7Sxx / 4Rxx / 6Rxx movt) will work.
Hello, will the NH36 stem work on a swap to a SKX013 case (midsize diver)? Or can I trim it a bit?
Hi Dan
The precut NH35 stem should work on the SKX013 !
[…] Read it here : https://seikoparts.wordpress.com/2017/03/27/supercharge-your-skx007-with-a-nh35/ […]
Hi Chuen,
Your site is full of great tips! I want to upgrade my SKX007 movement to an NH35 movement. Do you sell this as a kit? I don’t want to buy all of the parts from many different sellers.
Or do you sell NH35 movements that are ready to go into an SKX007 with all of the modifications made?
Kind Regards,
Steve
Hi Steve
I have the NH36 movement and pre-cut NH35/36 stem.
For the crown buy the ebay SKX aftermarket ones.
And you are set to go.
Had send you similar email reply.
Ive been reading elsewhere that the nh36 movement is too tall to fit in the SKX007. The second hand will rub against the glass. Is this true?
For the SKX application, it does not touch the crystal.
[…] Supercharge your SKX007 with a NH35/36 https://seikoparts.wordpress.com/2017/03/27/supercharge-your-skx007-with-a-nh35/ […]
There is no need to attempt a stem swap to the SARB059 crown, it already has the required stem fitted (6R15 and 4R35/6 are the same movement apart from finish and hairspring and mainspring material). In fact, the SARB crown stem is a one piece unit, and can not be separated- to the best of my knowledge.
Correctly said !
Great wealth of info. One slightly different question.
I have a midsized skx013 that I want to mod with a 4r36 movement. I have the movement from a donor watch, however I’ve not sure what stem and crown to use.
I’ve read that a SARB059 crown will not work because it’s too big but I’m not sure if this is true.
Also, don’t know if the 013 crown and stem is not detachable like the stock 007 stem and crown.
I know the mod can be done. I’ve seen them online here and there but when I ask those people about them they don’t respond.
Thanks for any input.
I believed the SKX013 crown/stem are also non-detachable ; like the SKX007.
Similarly, you can get an aftermarket crown (its shorter compared to the 007) from the bay. This will enable you to use the 4R/NH stem.
will the crown and stem of the seiko turtle work on the case of the skx? I’m unable to find the sarb059 crown.
Nope. It will not work.
Stem length is also different.
Currently, I will still suggest the eBay after market SKX crown or Dragon shroud Jumbo crown.
*another option is to try to New 4R Samurai crown.
Many thanks. I will look around.
Is it confirm that the Samurai Crown is a plug and play with either the NH35/36 or 6R15 upgrade? I notice that the Samuria Crown comes with the stem on it already.
Yes, it will fit (just like the SARB059 ones) !
My order with my supply source is pending since end Jan.
It takes alot of time. Once they arrive will put them up on the website.
(Limited qty thou).
It’s not 100% clear to me. To make the NH36 into 4 o’clock, you need all 3 wheels swapped…the Day Wheel, the intermediate day correction wheel, and the day-date correction wheel swapped? Or is it just 2 wheels (Day Wheel and the intermediate day correction wheel)?
Hi, Just only the intermediate day correction wheel and the DAY wheel disc is needed from the 7S26 into the NH35.
For NH36, only need to swap the DAY wheel disc (the intermediate day correction wheel is already there).
Is the 6R15 really worth the extra $$$. Other than 50 hrs reserve what is major advantage to the NH35/36?
The 6R has a nicer engraving.
In my opinion, these are the 2 main advantage. So is it worth it ?
6R15 has better accuracy. -15 -> +20 vs -20 -> +40. Itās like comparing a 2824-2 to a 2892-A2. It probably has more refined and better specād parts in it. It will keep time, in various positions, closer. Iād have to look at the technical manual to see if there are build differences, other than parts. If thatās not something you care about, then itās not worth it.
As the previous contributor has stated – better rate stability all round. The only two differences between the two are – 1, the mainspring being SPRON510 on the 6R15 vs SPRON100 – the better spring not only increases duration, but also gives a more even torque output at lower states of wind – ( lower torque = watch runs fast) 2, the balance and hairspring are different , the hairspring being SPRON610 – which is a much superior material and equivalent to the materials used in many high end Swiss movements. It’s stability is also better and less affected by temperature. Both the SPRON 510 AND 610 springs are virtually non-magnetic and shouldn’t be as affected by such. The 6R15 should also be adjusted better from the factory and display less isochronism. Having said that, my NH36 runs very nicely and loses approx 30 seconds every 10 days when worn 24/7.
So far I can only source a 6R15 thru eBay and it almost a price of an SKX007K1 already. Can anyone give some leads on where to get this movement at a better price? Thanks in advance.
Search for the NE15.
It is not cheap, easily 3x the cost of the 4R35/4R36.
True.
Hello Chuen,
I have a modding quest that’s been driving me nuts!
I would like to put my new NH36 in my SKX031, I am having trouble because I have no idea what crown to get that will fit the stem the NH36 came with. Do you have any ideas or suggestions? I was thinking about getting the crown protectors removed from the 031 and buying a sarb059 or sxk007 crown and going about it that way, but I don’t know if it’ll fit through the 031 tube?
Best regards,
Esteban.
The original crown/stem for the SKX031/33 are non-detachable (just like the SKX007). Therefore an aftermarket one needs to be source (ebay…..just like the SKX007 also). You can use the pre-cut stem with a little sanding to the length to accomodate (test fit first before sanding, as some report it fit while other say its just a tad longer).
*Dont think the SKX crown will fit.
[…] https://seikoparts.wordpress.com/2017/03/27/supercharge-your-skx007-with-a-nh35/ […]
[…] https://seikoparts.wordpress.com/2017/03/27/supercharge-your-skx007-with-a-nh35/ […]
Hi,
Thank you for all this info. This was very helpful. I have two skx, 007 and 009, bought for cheap on ebay. The 007 I put on an orange dial, military hands and a tropic strap from Uncle Seiko, and the 009 I put on the PADI Turtle dial and SARB crown.
On both watches I put on new cristal and all new gaskets, and finally the NH36 movement. (All done by a watchmaker, not me…).
As the watchmaker was putting in the new movement, he told me the day and date would not be aligned. Doing some research I found your site.
I tried but couldn’t figure out. What needs to be switch from the 7S to the NH36? The day wheel or the plate and jumper plate under? I tried changing both the plate and jumper plate, but the 4 screws are not located on the same area! So I can’t put on the 7S plate to the NH36. I tried swapping just the day wheel disk but then it does’t change anything, it’s still slightly off.
Any idea or help?
Thanks!
Firstly, the 7s26 from the SKX007, 009 being with a 4pm crown (specifically 3.45pm).
The NH36 is a 3pm crown orientation.
Therefore just swap over the DAY wheel will be sufficient to do the job. Nothing else. All others remains.
…….”I tried swapping just the day wheel disk but then it doesāt change anything, itās still slightly off.”………
Its suppose to be that way, as once the dial is installed, and movt installed into the SKX case at 4pm crown position. It will shows its correct.
Hi Chuen
Just to complicate matters further, I’m looking to install the NH35 in place of a 7s26 but also rotate the movement/case 180 degrees so the crown is at 10 as I prefer a left-handed watch. This will leave the date misaligned in the window half-way between numbers. Do you know of any way of correcting this do you? Or where I could get a custom date wheel with the numbers printed between teeth?
Loving your stuff, all the best
Jim
Nice project ! But as you already know, the DATE wheel will be misaligned.
To custom made a new DATE wheel to suit, it will needs substantial qty, mould and fixture cost before factory are willing to produce them.
Therefore, the easiest solution is to use a NO DATE dial instead !
Thanks Chuen, I thought that was probably the case and I would prefer no date anyway but as is typical all the dials I like from Dagaz and Yobokies have a date window š
Do ask them. Think they do have no date hole dials.
Hey folks. I have a 1996 SDS101 7002-7039 Diver 200m, it wasn’t working for some years, so I decided to open it, poke around a bit and it started ticking. It’s been for a week now, but I’m waiting for it to stop again. Maybe because the last time if was pro serviced was more than 10 yrs ago. Should I just swap movements to something more “modern”? If so, what exact mov would fit (crown/stem at 4pm, date at 3pm)? Oh, and I would like to keep the old date wheel since it’s silver not white (yuck). Any leads will be greatly appreciated. THX!
Keep it and probably have it service to last another 10 years !
hello sir! i adore my skx173 but the lack of hacking botters me a lot! do you have a kit with everything that i need to change the movemento for a nh 35/36 that would be plug and play?
You will need a NH36 and a crown + stem kit. All these can be purchased here or send me a email seikoparts.wordpress@gmail.com
Hello Sir,
Very interested in this. Let me ask you;
I own same Seiko Map Meter like you. Unfortunately this map meter only lasted 2-3 years, then 7S36 movement died.
Now, instead of reinstalling 7S26 or 7S36 movement, would I be able to fit a NH movement? If yes, which other parts would be needed?
Note. This would be my first experience with disassembling a watch, and I need to buy all the tools (and of course parts) first…
Hi, thanks for yr email.
The needed parts will be :
NH36
S crown
NH36 stem
7s26 Day wheel (swap)
My email is seikoparts.wordpress@gmail.com
Hi, I have 2 questions : the movement of my seiko 7002 is in bad condition so I want to change it by a NH35. Is your kit crown+stem for SKX will fit on my watch? And do you propose a complete kit to upgrade it? Thank you.
PS : very nice and interresting blog
Yes, the NH36 does fit, because itās a 4pm crown position, a no date dial will be suited.
You will need a NH36, S Crown and a NH36 stem.
Send me an email at seikoparts.wordpress@gmail.com
I lost one of date plateās screw . It jumped when I was trying to install the screw. Do you know where can I get it ?
Hi
Do you have a pix of the location of the screw ?
Itās the same screw above pic. There were 4 screws to open date plates
You mean the same plate which hold the 3 pcs (flat head) and 1 pc (Cross head) ?
Nice tutorial. Iām planning to install an NH36 movement into a brand new SKX diver case. I understand that I will need to change the day wheel on the NH36 movement but do not know what day wheel part number to look for to ensure the right alignment? I have seen some online tutorials where the day wheel being transferred from the original SKX is marked 0160282M so Iām thinking that must be the right part, but I cannot find one for sale. Some sellers are offering day wheels marked 0160254S and saying they are suitable for the NH36 mod – but are they? (Iām looking for an English / Kanji day wheel.)
Just quite simple.
Just look for PN 0160282M ; the 4pm crown position DAY wheel.
Hi, you can use the 7S26 day wheel (4pm). There is no need to swap the date wheel.
If you need to purchase one. Go for the PN 0160 281 (Kanji).
A few years ago I mod my SKX with SARB059 crown [Seiko Part Number 1E70D1SNS0] and naw servise of the movement and change the gaskets are necessary. Any idea whether genuine SKX crown stem gasket [Seiko Part Number EZ0140B0A] will fit 1E70D1SNS0 crown or should i look for SARB059 crown gasket?
How often you replacing your`s diver gaskets to ensure his water resistance?
Hi, both gasket are the same. They should interchangeable.
Thanks.
What do you think about the quality of aftermarket crown stem gaskets? I have access to OEM caseback and bezel gaskets, but because of the current pandemic situation crown one is hard to find.
It depend on the important of water resist to you. Aftermarket gasket are generally ok. Itās the dimension spec thatās more important.
Hi Michael, the precut stem was sold out long time ago. Also because there is so much variation of crown thatās why itās discontinued.
As for the crown, noted yr comment although itās the first time.
Hey, I want to swap the day/date wheel in my watch but cant afford a whole set of watchmaking screwdrivers, what size is the screwdriver you used to take out screws # 0012 354? Cheers
I am using size 000 Philip head or a modified flat head.
*pls use quality screwdriver for this application as the low end screwdriver tends to round the screw !